I bought a few potted mums about a month ago from the grocery store greenhouse. No tags or labels- I don't know if they are hardy or not. This was end of May, first part of June and they were in full bloom. I immediately planted them in a nice sunny spot, Good soil, lots of compost. Within a week or two the blooms all turned brown. The leaves look nice and green and bushy still. So, my question is- could these be hardy mums? ( I am in zone 4) Will they bloom again this fall? And what should I do with them now? Cut them back? leave them alone? Throw them in the compost heap? I appreciate your help!